After discovering this new quest system last night I was in awe at the creativity and clever methods of improving the popularity of their website. 
I began clueless to the whole the thing and didn't understand it at all but once I found the quest tab (duh ¬_¬) I became quite addicted as I'm sure a fair number of people have become. 
 
I have always been a completionist even before the xbox 360 achievement system with the ps2, ps1, gameboy etc. I always felt the need to "Catch 'em all!" and get a beautiful '100%' appear on my screen. When I bought my 360 and became familiar with the achievement system I became more of a completionist and would spend hours even after completing the main storylines and side missions or whatever, to get that beautiful 100%. 
 
Then when I saw this quest system I was overwhelmed with temptation to complete all of these :O I have found these quests more addicting and more fulfilling than my achievement hunting. I think GiantBomb have truly outdone themselves this time. A HUGE well done to you :) And a huge thank you as well :)